South Shore National and Mid-Island both advanced to the Little League District 24 10s All-Star Tournament winner’s bracket final with semifinal victories last night at Staten Island Little League.

Kyle Omundsen’s fifth-inning homer snapped a tie and led SS National to a 3-2 win over Great Kills National.

Winning pitcher Anthony Sperto plated the game’s lone run with a third-inning single as Mid-Island edged SS American 1-0.

South Shore National and Mid-Island will look to advance to the championship round when they meet Monday (7:30) at SILL.

SS National 3, GK National 2

With the score tied at two and two outs in the top of the fifth, clean-up hitter Omundsen belted a solo shot over the centerfield fence to give SSN the lead for good.

“The kid hits every ball hard,” said SSN manager Bob Laterza of the righty-hitting Omundsen. “He has the ability to hit in that type of situation and that’s one of the reasons he bats clean-up.

“We want him hitting in that type of situation.”

Omundsen’s homer made a winner of right-hander Luke McDonald, who struggled early, but ironed out the kinks to turn in a solid performance. He allowed two runs on three hits and fanned five before being lifted because of the mandatory-pitch rule after five innings.

McDonald hit a pair of batters in the first and thanks to key at-bats from Arden Demartino (RBI ground out) and Michael Flynn (RBI single), GKN led 2-0 early.

SS National, however, tied the score on Anthony Bellina’s two-run single in the third and McDonald did his part over the next few frames, stranding a pair of GKN runners on third in the process.

Bellina, who finished with two hits, allowed a one-out infield single to Flynn (two hits), who moved to third on wild pitches. The SSN reliever, however, bounced back to get the next two hitters to preserve the win.

Reliever Kevin Duffy, who had a triple, did a solid job on the mound for GKN. The righty allowed one run on three hits and a walk in 3Ò innings. He finished with three strikeouts.

Mid-Island 1, SS American 0

Sperto (eight Ks) stymied the Tottenville loop for 4Ð innings, allowing just two singles and two walks before exiting because of the mandatory-pitch rule.

But MILL’s Joey Tucker led off the third with a walk and, after advancing on a fielder’s choice, he came home on Sperto’s hit off the centerfield fence. Sperto was thrown out trying to stretch a single into a double, but the damage was done.

With a runner on first and two outs in the bottom of the sixth, a hit to right-center had SSA knocking on the door. But MILL third baseman Matt McCarthey tagged out the potential game-tying run thanks to beautiful relay throws from centerfielder Tucker and second baseman Ryan DiMeo.

“If South Shore’s kid is safe, they have second and third and a good chance to win the game on a hit,” said MILL coach John Braccia, who praised shortstop Charlie Romeo and right-fielder Matt Pleszewicz for their defensive play. “It was a huge defensive play. The relay throw was perfect.”